Rome, January 18 - Embattled Quarto Mayor Rosa Capuozzo who was ejected from the 5-Star Movement (M5S) last week after refusing to resign amid a probe into alleged mafia infiltration of her administration is to appear before Italy's bicameral anti-mafia commission on Tuesday, sources said Monday. Capuozzo will be accompanied to Rome by a coachload of supporters. The mayor is at the centre of a bitter row with her former party over its handling of the affair. She claims she informed M5S bigwigs "immediately" of her November 24 interrogation about threats she allegedly received from fellow councillor Giovanni De Robbio, who was expelled from the M5S after allegations of Camorra mafia links. By contrast, the movement founded by comedian Beppe Grillo says it only learned that De Robbio was under investigation in December. In a post to her Facebook profile on Monday Capuozzo said that the M5S had "thrown the baby out with the bathwater". "A political choice was made in a grey room in Milan," she wrote in a separate post. "I made a choice based on principle for the honest residents of Quarto. It is a form of respect that Quarto deserved: to stay and fight. Now we will work for the local area even more incisively with the movement's principles in our hearts," she continued. "I say again, quoting Don Milani: 'No point keeping your hands clean if all you do is keep them in your pockets'," she concluded. Meanwhile M5S said Monday statements made by Capuozzo confirmed its claims that it had never been informed of the alleged attempt by De Robbio to blackmail her.